You can set up your main "outer" template in app/views/index.volt, and then the individual page "inner" templates go into files like app/views/index/index.volt and app/views/about/index.volt and so on. Any data preparation or logic will go into the controller files in app/controllers/IndexController.php and app/controllers/AboutController.php and so on. The routing will take care of putting it all together.